Use CefSharpSettings.RuntimeStyle by default and fallback to Alloy st…

…yling

- Allow for configuring of the CEF RuntimeStyle globally.
- Consistent with WinForms

CefSharp.Wpf.HwndHost/ChromiumWebBrowser.cs

@@ -1508,7 +1508,8 @@ public IWebBrowser WebBrowser
         /// </example>
         protected virtual IWindowInfo CreateBrowserWindowInfo(IntPtr handle)
         {
-            var windowInfo = new WindowInfo();
+            var windowInfo = Core.ObjectFactory.CreateWindowInfo();
+            windowInfo.RuntimeStyle = CefSharpSettings.RuntimeStyle ?? CefRuntimeStyle.Alloy;
             windowInfo.SetAsChild(handle);
 
             if (!ActivateBrowserOnCreation)